how tadpole and an adult frog breath differently
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Sometimes more than a quarter of the oxygen they use is absorbed directly through their skin. Tadpoles and some aquatic amphibians have gills like fish that they use to breathe. There are a few amphibians that do not have lungs and only breathe through their skin.
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Their gills absorb oxygen directly from the water in which they swim, releasing waste carbon dioxide at the same time. As they mature, the gills are slowly absorbed, and primitive lungs begin to develop. For a time, tadpoles have both lungs and gills.
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